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22 Cards in this Set
- Front
- Back
The slump test is applicable to plastic concrete with a maximum size aggregate of _____ |
1 1/2" |
|
When the concrete contains aggregate larger than allowed for the slump test, the large aggregate must be _____ |
Wet Sieved |
|
The mold for making the slump test is in the shape of ______ |
Cone |
|
The height of the slup mold is |
12" +- 1/8" |
|
The interior surface of the slump is allowed to have minor irregularities. T or F |
False |
|
For use in the slump test, the end of both ends of the tamping rod must be |
Rounded |
|
The sample of concrete for use in making the slump test must be obtained in accordance with ASTM Standard |
C-172 |
|
The slump mold should be in a dry condition before beginning the test. T or F |
False |
|
The surface on which the slump mold will be placed must be |
Level / Moist |
|
The slump mold is filled _____ layers |
3 |
|
Each layer should fill approximately _____ the volume of the mold |
1/3 |
|
The approximate concrete depth (in vertical distance) after placing the first layer is _____ and the second layer is _____ |
2 5/8 and 6 1/8 |
|
What is the specified number of roddings for each layer? |
25 |
|
How deep should the tamping rod penetrate into each layer? |
1'' |
|
When rodding the bottom layer, the tamping rod must be _____ to uniformly distribute the strokes |
angled |
|
What must be done if the concrete drops below the top of the slump mold while the top layer is being rodded? |
Add additional material |
|
Prior to lifting the mold, concrete must be removed from |
Bottom of Mold |
|
After the final rodding, the sides of the slump mold should be tapped lightly with the tamping rod. T or F |
False |
|
When raising the slump mold, it should not be rotated or twisted |
True |
|
How much time is allowed for lifting the slump mold? |
5 seconds +- 2 seconds |
|
The measurement for slump is made from the top of the mold to what point of the concrete specimen? |
Displaced Center |
|
The slump of the concrete is measured and reported to the nearest |
1/4'' or 5mm |